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Adaptation behavior of skilled infant bouncers to different spring frequencies.

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  • معلومة اضافية
    • Alternate Title:
      Comportamento da adaptação das oscilações de bebés em diferentes frequências de mola.
    • Subject Terms:
    • Author-Supplied Keywords:
      Biomechanics
      Infant
      Motor activity
      Motor skills
      atividade motora
      bebés
      biomecânica
      habilidades motoras
      Language of Keywords: English; Portuguese
    • NAICS/Industry Codes:
      417930 Professional machinery, equipment and supplies merchant wholesalers
      541420 Industrial Design Services
    • Abstract:
      Infants explore their environments through repetitive movements that are constrained or facilitated by the environmental context. In this study, we evaluated how skilled bouncers adapted to bouncing in systems with four different spring conditions (natural frequencies of 0.9, 1.15, 1.27 and 1.56 Hz). Trunk kinematics and vertical ground reaction forces (VGRFs) were recorded from three pre-walking infants (mean age 10.6 ± 0.9 months). Bounce frequency, trunk displacement, peak VGRF, percent of time on the ground and time to peak force as a function of time on the ground were analyzed. In addition, infant bounce frequencies were compared to measured oscillations of an inert mass equivalent to each infant's mass. All infants bounced above the natural frequency of the spring system in all conditions suggesting that they did not behave solely like mass-spring systems. Infants produced asymmetrical VGRF loading patterns suggesting that a timing component, such as bounce frequency, was regulated. Skilled infants consistently increased their bounce frequency as their vertical trunk displacement decreased; however, the mode for regulating bounce frequency differed from infant to infant. [ABSTRACT FROM AUTHOR]
    • Abstract:
      Os bebés exploram o meio ambiente através de movimentos repetitivos que são constrangidos ou facilitados por esse mesmo meio. Neste estudo avaliámos como bebés adaptam as oscilações corporais em quatro condições diferentes (frequência natural de 0.9, 1.15, 1.27 e 1.56Hz). A frequência de oscilação, a cinemática do tronco e a componente vertical da força de reação ao solo (VFRS) foram registadas em bebés antes do domínio da marcha autónoma (idade média 10.6 ±0.9 meses). Foram analisadas a frequência de oscilação, deslocamento do tronco, pico da VFRS, percentagem de tempo no solo e duração até ao pico da força em função do tempo. Além disso, as frequências de oscilação dos bebés foram comparadas com a de uma massa inerte de valor equivalente. Todos os bebés oscilaram acima da frequência natural do sistema mola em todas as condições, sugerindo que eles não se comportam apenas como um sistema mola-massa passivo. Os bebés produziram padrões de carga assimétricos para a VFRS, o que sugere que uma componente temporal, tal como a frequência de oscilação, foi regulada. Bebés consistentemente aumentaram a frequência de oscilação enquanto o deslocamento vertical do tronco diminuiu; contudo, o modo de regulação da frequência de oscilação difere de bebé para bebé. [ABSTRACT FROM AUTHOR]
    • Abstract:
      Copyright of Motricidade is the property of Fundacao Tecnica e Cientifica do Desporto and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
    • Author Affiliations:
      1School of Human Kinetics, University of Ottawa
      2Graduate Department of Rehabilitation Science, University of Toronto
      3Department of Mechanical Engineering, University of Ottawa
      4School of Rehabilitation Sciences, University of Ottawa
    • ISSN:
      1646-107X
    • Accession Number:
      10.6063/motricidade.2944
    • Accession Number:
      103179319
  • Citations
    • ABNT:
      PEREZ, O. H. et al. Adaptation behavior of skilled infant bouncers to different spring frequencies. Motricidade, [s. l.], v. 11, n. 1, p. 25–38, 2015. DOI 10.6063/motricidade.2944. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=103179319&custid=s8280428. Acesso em: 26 maio. 2020.
    • AMA:
      Perez OH, Walters-Stewart C, Robertson DGE, Baddour N, Sveistrup H. Adaptation behavior of skilled infant bouncers to different spring frequencies. Motricidade. 2015;11(1):25-38. doi:10.6063/motricidade.2944.
    • APA:
      Perez, O. H., Walters-Stewart, C., Robertson, D. G. E., Baddour, N., & Sveistrup, H. (2015). Adaptation behavior of skilled infant bouncers to different spring frequencies. Motricidade, 11(1), 25–38. https://doi.org/10.6063/motricidade.2944
    • Chicago/Turabian: Author-Date:
      Perez, Olinda Habib, Coren Walters-Stewart, D. G. E. Robertson, Natalie Baddour, and Heidi Sveistrup. 2015. “Adaptation Behavior of Skilled Infant Bouncers to Different Spring Frequencies.” Motricidade 11 (1): 25–38. doi:10.6063/motricidade.2944.
    • Harvard:
      Perez, O. H. et al. (2015) ‘Adaptation behavior of skilled infant bouncers to different spring frequencies’, Motricidade, 11(1), pp. 25–38. doi: 10.6063/motricidade.2944.
    • Harvard: Australian:
      Perez, OH, Walters-Stewart, C, Robertson, DGE, Baddour, N & Sveistrup, H 2015, ‘Adaptation behavior of skilled infant bouncers to different spring frequencies’, Motricidade, vol. 11, no. 1, pp. 25–38, viewed 26 May 2020, .
    • MLA:
      Perez, Olinda Habib, et al. “Adaptation Behavior of Skilled Infant Bouncers to Different Spring Frequencies.” Motricidade, vol. 11, no. 1, Jan. 2015, pp. 25–38. EBSCOhost, doi:10.6063/motricidade.2944.
    • Chicago/Turabian: Humanities:
      Perez, Olinda Habib, Coren Walters-Stewart, D. G. E. Robertson, Natalie Baddour, and Heidi Sveistrup. “Adaptation Behavior of Skilled Infant Bouncers to Different Spring Frequencies.” Motricidade 11, no. 1 (January 2015): 25–38. doi:10.6063/motricidade.2944.
    • Vancouver/ICMJE:
      Perez OH, Walters-Stewart C, Robertson DGE, Baddour N, Sveistrup H. Adaptation behavior of skilled infant bouncers to different spring frequencies. Motricidade [Internet]. 2015 Jan [cited 2020 May 26];11(1):25–38. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=103179319&custid=s8280428